They are so rare that their unforgetfulness has a medical name: hyperthymesia.

这非常罕见，医学上称之为超忆症。

One of them is called hyperthymesia.

其中之一就是所谓的亢奋。

Hyperthymesia is a rare mental state or neurological condition where a person has a very detailed autobiographical memory.

过度记忆是一种罕见的精神状态或神经系统疾病，在这种情况下，一个人拥有非常详细的自传体记忆。

Hyperthymesia can also feel pretty isolating.

亢奋也会让人感到非常孤立。

Though it may seem really useful to be able to remember so much, hyperthymesia has its downsides.

虽然能够记住这么多似乎真的很有用，但过度记忆也有其缺点。

According to a recent study on hyperthymesia, your amygdala may play a bigger role in your autobiographical memory than we once thought.

根据最近一项关于超重症的研究，你的杏仁核在你的自传体记忆中扮演的角色可能比我们曾经想象的要大。

Compared to those without the condition, the researchers found that HK, a man with autobiographical hyperthymesia, had an enhanced amygdala-to-hippocampus connection and greater right amygdala hypertrophy, approximately 20 percent.

与没有这种情况的人相比， 研究人员发现，患有自传性亢进症的 HK 的杏仁核与海马体的连接增强， 右侧杏仁核肥大程度更大，约为 20%。